Carey Young, whose "invisible" artwork is up for Tuesday's £20,000 Beck's Futures art prize, has been accused of plagiarism, reports say.
No-one will see Carey Young's Beck's Futures commission
Young's conceptual piece has been criticised as unoriginal by a Swedish artist, the Daily Telegraph reported.
The piece consists of a legal document forbidding the sponsors of the show from disclosing what she had been commissioned to make.
The Beck's Futures is an alternative to the Turner Prize, and features nine shortlisted artists whose works are displayed in London's Institute of Contemporary Arts.
The winner will be announced on Tuesday evening.
Anna Livia Lowendhal-Atomic told the Daily Telegraph that Young's work bore "striking similarities" to her own.
The Swedish artist's work, A Selection of Interesting Secrets from Various Stages in my Life, features legal documents offering 37 of her secrets for sale.
David Sherry appears to sew wood to his feet in his shortlisted video
But any potential buyer must sign a confidentially agreement binding them never to reveal what the secret is.
"I have reason to think that Cary Young has seen my work," she told the Daily Telegraph.
"I think its is quite ironic that hers should be shown in the ICA which prides itself on showing fresh and original work."
Miss Lowendhal-Atomic has called on the ICA to remove Miss Young from the shortlist, a move the ICA has called unnecessary.
The Telegraph reported that Miss Young denied copying the work of another artist in her shortlisted piece.
Last year Wombles creator Mike Batt was accused of infringing the copyright of American minimalist composer John Cage, after placing a one-minute silence on his CD.
The late Cage's publishers said the silence had been taken from his 1952 work 4'33", which consists of four minutes and 33 seconds of nothing.
The case was later settled out of court, with Batt paying a six-figure sum to charity, but he insisted his silence was original.